A welding module for BC battery string welding

Abstract

The utility model discloses a kind of welding modules for BC battery string welding, including welding seat top plate, welding seat middle layer plate and welding seat bottom plate, the both sides of welding seat top plate are fixed with down bar, upper bar is moved along left and right direction on down bar, welding wire clamp block is set on down bar and upper bar, the outside of welding seat top plate is provided with press strip limiting block, press strip limiting block moves along front and back direction, the outer end of press strip limiting block is shaped with limiting platform, venting column and guiding positioning column are set in welding seat installation cavity position, the lower end of welding seat bottom plate is installed with several blow connecting ring, the lower end of blow connecting ring is installed with venting ring.The welding module for BC battery string welding uses the relative activity of upper bar and down bar, and the limiting platform outside is positioned to the cutting good welding wire, it is convenient to align the welding point position on silicon wafer, while using positioning column to ensure the stability of each layer structure, cooperate hot welding to blow inside, improve the quality of hot welding.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon wafer string bonding, and more particularly to a welding module for BC battery string bonding. Background Technology

[0002] Photovoltaic silicon wafers are the core and most valuable component of a solar power system. Their function is to convert solar energy into electrical energy, which is then stored in batteries or used directly as a power source. In BC cells (back-contact cells, which can be combined with various circuits), the welding wire needs to be positioned precisely and aligned with the solder points on the silicon wafer for heat welding. Conventional modules or conveyor tracks cannot accurately position the welding wire, and the structural integrity of the various modules is insufficient. Utility Model Content

[0003] One objective of this invention is to provide a welding module for BC battery string welding, which pre-positions the welding wire and silicon wafer for hot welding, and simultaneously coordinates with the air blowing action during the hot welding process.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A welding module for BC battery string welding includes a welding base top plate, a welding base middle plate, and a welding base bottom plate. The welding base bottom plate has a welding base mounting cavity in its center. The welding base middle plate is located within the welding base mounting cavity. The welding base top plate covers the middle plate. Lower pressure bars are fixed to both sides of the welding base top plate. Upper pressure bars move along the left-right direction on the lower pressure bars. Welding wire clamps are provided on both the lower and upper pressure bars. A welding wire clamp is provided on the outer side of the welding base top plate. A pressure strip limiting block is provided, which moves along the front-back direction. The outer end of the pressure strip limiting block is formed into a limiting platform. A venting column and a guide positioning column are provided in the welding seat mounting cavity. The upper ends of the venting column and the upper ends of the guide positioning column pass through the middle layer plate of the welding seat and are inserted into the top plate of the welding seat. Several air blowing connecting rings are installed at the lower end of the bottom plate of the welding seat. A venting ring is installed at the lower end of the air blowing connecting ring. A venting cavity is provided between the air blowing connecting ring and the venting ring.

[0006] As a preferred technical solution, a plurality of ejector pin shafts are distributed on the middle layer plate of the welding base, and the ejector pin shafts extend upward after passing through the top plate of the welding base.

[0007] As a preferred technical solution, welding wire clamping cylinders are fixed around the perimeter of the welding base plate, and a pressure bar swing member is hinged to the outer end of the welding base top plate. The driving end of the welding wire clamping cylinder abuts against one end of the pressure bar swing member. A spring top sleeve is fixed on the welding base top plate, and the spring top sleeve is in elastic contact with the other end of the pressure bar swing member. The pressure bar swing member presses against the outside of the upper pressure bar.

[0008] As a preferred technical solution, a suction cup is installed in the middle of the top plate of the welding seat, and the suction cup is connected to the upper end of the ventilation column.

[0009] As a preferred technical solution, the middle layer plate of the welding seat is provided with a middle layer support column, and a support column limiting block is installed at the lower end of the middle layer support column. A magnet is provided inside the support column limiting block.

[0010] As a preferred technical solution, a magnet connecting shaft is installed inside the middle layer support column of the welding base. The lower end of the magnet connecting shaft is connected to the magnet by a screw, and a spring is installed at the upper end of the magnet connecting shaft. The spring is located inside the middle layer support column of the welding base.

[0011] As a preferred technical solution, the upper surface of the middle layer plate of the welding seat is provided with a fixing wire groove, a pin fixing wire is placed in the fixing wire groove, a pin sleeve is fitted on the lower end of the pin shaft, a pin protrusion ring is arranged around the pin sleeve, and the pin fixing wire is engaged with the lower end of the pin protrusion ring.

[0012] As a preferred technical solution, a base plate air pipe connector is provided on one side of the welding base plate, and the base plate air pipe connector is connected to the air column and the air cavity.

[0013] As a preferred technical solution, a heating plate is installed between the middle layer plate of the welding base and the top plate of the welding base, a heating rod is fixed inside the heating plate, and a temperature sensor is installed on one side of the heating plate.

[0014] As a preferred technical solution, a heat insulation plate is provided on the base plate of the welding seat, and the heat insulation plate is locked to the upper edge of the welding seat mounting cavity.

[0015] The beneficial effects of this utility model are as follows: It provides a welding module for BC battery string welding. The welding module for BC battery string welding adopts the relative movement of the upper and lower pressure bars and the positioning platform on the outside to position the cut welding wire, which is convenient to align with the welding point position on the silicon wafer. At the same time, the positioning column is used to ensure the stability of the upper and lower layers of the structure. In conjunction with hot welding, air is blown into the inside to improve the quality of hot welding. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an exploded view of a welding module for BC battery string bonding as described in the embodiment.

[0018] Figure 2 This is a schematic diagram of the first overall structure (with welding wire) of a welding module for BC battery string welding as described in the embodiment.

[0019] Figure 3 This is a schematic diagram of the second overall structure (without welding wire) of a welding module for BC battery string welding as described in the embodiment.

[0020] Figure 4 This is a structural diagram of the combination of the top plate and the middle plate of the welding socket as described in the embodiment.

[0021] Figure 5 This is a structural diagram of the combination of the middle layer plate and the bottom plate of the welding socket as described in the embodiment.

[0022] Figure 6 This is a first cross-sectional view of a welding module for BC battery string bonding as described in the embodiment;

[0023] Figure 7 This is a second cross-sectional view of a welding module for BC battery string bonding as described in the embodiment;

[0024] Figure 8 This is an exploded view of the middle layer plate of the welding socket described in the embodiment;

[0025] Figure 9 This is an exploded view of the welding base plate described in the embodiment;

[0026] Figure 10 This is a cross-sectional view of the air-blowing connecting ring described in the embodiment.

[0027] Figures 1 to 10 middle:

[0028] 1. Welding base top plate; 2. Welding base middle plate; 3. Welding base bottom plate; 4. Welding base mounting cavity; 5. Lower pressure bar; 6. Upper pressure bar; 7. Welding wire clamp; 8. Pressure bar limiting block; 9. Limiting platform; 10. Ventilation column; 11. Guide positioning column; 12. Air blowing connecting ring; 13. Ventilation ring; 14. Ventilation cavity; 15. Ejector pin shaft; 16. Welding wire clamping cylinder; 17. Pressure bar swing piece; 18. Spring top sleeve seat; 19. Suction cup; 20. Welding base middle layer support column; 21. Support column limiting block; 22. Magnet; 23. Magnet connecting shaft; 24. Spring; 25. Ejector pin fixing screw; 26. Ejector pin sleeve; 27. Ejector pin protrusion ring; 28. Base plate air pipe connector; 29. ​​Heating plate; 30. Heat insulation plate; 31. Welding wire; 32. Temperature sensor. Detailed Implementation

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 10 As shown in this embodiment, a welding module for BC battery string welding includes a welding base top plate 1, a welding base middle plate 2, and a welding base bottom plate 3. A welding base mounting cavity 4 is provided in the center of the welding base bottom plate 3. The welding base middle plate 2 is located within the welding base mounting cavity 4. The welding base top plate 1 covers the welding base middle plate 2. Lower pressure strips 5 are fixed on both sides of the welding base top plate 1. Upper pressure strips 6 move along the left-right direction on the lower pressure strips 5. Welding wire clamps 7 are provided on both the lower pressure strips 5 and the upper pressure strips 6. A welding wire clamp 7 is provided on the outer side of the welding base top plate 1. There is a pressure strip limiting block 8, which moves along the front and back direction. The outer end of the pressure strip limiting block 8 is formed into a limiting platform 9. The welding seat mounting cavity 4 is provided with a ventilation column 10 and a guide positioning column 11. The upper end of the ventilation column 10 and the upper end of the guide positioning column 11 both pass through the middle layer plate 2 of the welding seat and are inserted into the top plate 1 of the welding seat. Several air blowing connecting rings 12 are installed at the lower end of the welding seat bottom plate 3. A venting ring 13 is installed at the lower end of the air blowing connecting ring 12. There is a ventilation cavity 14 between the air blowing connecting ring 12 and the venting ring 13.

[0031] The cut welding wire 31 is placed on the top plate 1 of the welding base. When the upper pressure bar 6 moves left and right, it cooperates with the fixed lower pressure bar 5 so that the two welding wire clamps 7 clamp the single section of welding wire 31 in the left and right directions. In the front and back direction, the pressure bar limiting block 8 moves inward, and the limiting platform 9 positions and clamps the end of the welding wire 31. The upper end of the ventilation column 10 adsorbs the silicon wafer onto the top plate 1 of the welding base. The air blowing connecting ring 12 vents air from the position of the ventilation ring 13. The air blowing connecting ring 12 uses Bernoulli to bring in gas into the interior of the welding module.

[0032] Several ejector pins 15 are distributed on the middle layer plate 2 of the soldering base. The ejector pins 15 pass through the top plate 1 of the soldering base and extend upward. The ejector pins 15 on the middle layer plate 2 of the soldering base rise upward and place the welding wire 31 against the solder joint of the silicon wafer, waiting for hot soldering.

[0033] Welding wire clamping cylinders 16 are fixed around the base plate 3 of the welding seat. A pressure bar swing piece 17 is hinged to the outer end of the top plate 1 of the welding seat. The driving end of the welding wire clamping cylinder 16 presses against one end of the pressure bar swing piece 17. A spring top sleeve 18 is fixed on the top plate 1 of the welding seat. The spring top sleeve 18 is in elastic contact with the other end of the pressure bar swing piece 17. The pressure bar swing piece 17 presses against the outside of the upper pressure bar 6.

[0034] The wire clamping cylinder 16 controls the drive end to rise, which moves the pressure bar swing piece 17 inward, so that the pressure bar swing piece 17 applies pressure to the side of the upper pressure bar 6, causing the upper pressure bar 6 to move on the lower pressure bar 5. The two wire clamping blocks 7 can clamp the wire 31. When it is necessary to open the wire clamping blocks 7, the wire clamping cylinder 16 retracts, and the pressure bar swing piece 17 is pulled back to its original position under the action of the spring top sleeve seat 18.

[0035] A suction cup 19 is installed in the middle of the top plate 1 of the welding base. The suction cup 19 is connected to the upper end of the ventilation column 10 and can adsorb and fix the silicon wafer.

[0036] A middle layer support column 20 is provided on the middle layer plate 2 of the welding seat. A support column limiting block 21 is installed at the lower end of the middle layer support column 20. A magnet 22 is provided inside the support column limiting block 21. A magnet connecting shaft 23 is installed inside the middle layer support column 20. The lower end of the magnet connecting shaft 23 is connected to the magnet 22 by screws. A spring 24 is installed at the upper end of the magnet connecting shaft 23. The spring 24 is located inside the middle layer support column 20 of the welding seat.

[0037] The entire fixed structure can be magnetically attracted to the welding module by the magnet 22 below the support column limiting block 21, making it easy to adjust the position. Moreover, the spring 24 on the magnet connecting shaft 23 can ensure that there will be no hard collision during the magnetic attraction process, thus extending the service life.

[0038] The upper surface of the middle layer plate 2 of the welding seat is provided with a fixing wire groove, and a pin fixing wire 25 is placed in the fixing wire groove. A pin sleeve 26 is fitted on the lower end of the pin shaft 15. A pin protrusion ring 27 is arranged around the pin sleeve 26. The pin fixing wire 25 is engaged with the lower end of the pin protrusion ring 27.

[0039] Under the action of the ejector pin fixing wire 25, the ejector pin sleeve 26 is clamped on the middle layer plate 2 of the welding seat, which helps the ejector pin shaft 15 to elastically press the welding wire 31 against the silicon wafer.

[0040] A base plate air pipe connector 28 is provided on one side of the base plate 3. The base plate air pipe connector 28 is connected to the air column 10 and the air chamber 14. Air is received from the base plate air pipe connector 28. The air from the air column 10 adsorbs and fixes the silicon wafer. The gas from the air chamber 14 causes the air blowing connecting ring 12 to spray the gas to the bottom of the middle layer plate 2 and the base plate 3 of the soldering seat.

[0041] A heating plate 29 is installed between the middle layer plate 2 and the top plate 1 of the welding base. A heating rod is fixed inside the heating plate 29. A temperature sensor 32 is installed on one side of the heating plate 29. During the hot welding process, the heating below the silicon wafer is achieved by energizing the heating rod, which causes the heating plate 29 to generate heat on the top plate 1 of the welding base. The duration of the heating rod's heating operation is controlled by the temperature sensor 32. Lower pressure strips 5 are fixed on both sides of the top plate 1 of the welding base. An upper pressure strip 6 moves along the left and right direction on the lower pressure strip 5. Welding wire clamps 7 are provided on both the lower pressure strip 5 and the upper pressure strip 6.

[0042] A heat insulation plate 30 is provided on the base plate 3 of the welding seat. The heat insulation plate 30 is locked on the upper edge of the mounting cavity 4 of the welding seat. The heat insulation plate 30 blocks heat and effectively protects the temperature of the components on the middle layer plate 2 and the base plate 3 of the welding seat. The guide positioning column 11 combines the top plate 1, the middle layer plate 2 and the base plate 3 of the welding seat together.

[0043] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles applied thereto. Within the scope of the technology disclosed in this utility model, any variations or substitutions that are easily conceived by those skilled in the art should be covered within the protection scope of this utility model.

Claims

1. A welding module for BC battery string bonding, characterized in that, The welding base includes a top plate, a middle plate, and a bottom plate. A welding base mounting cavity is located in the center of the bottom plate. The middle plate is situated within this cavity. The top plate covers the middle plate. Lower pressure strips are fixed to both sides of the top plate. An upper pressure strip moves along the left-right direction on each lower pressure strip. Wire clamps are mounted on both the lower and upper pressure strips. A pressure strip limiting block is located on the outer side of the top plate and moves along the front-back direction. A limiting platform is formed at the outer end of the limiting block. A venting column and a guide positioning column are located within the mounting cavity. The upper ends of the venting column and the guide positioning column pass through the middle plate and are inserted into the top plate. Several air-blowing connecting rings are mounted at the lower end of the bottom plate. A venting ring is mounted at the lower end of each air-blowing connecting ring, and a venting cavity exists between the air-blowing connecting ring and the venting ring.

2. The welding module for BC battery string bonding according to claim 1, characterized in that, The middle layer plate of the welding base has several ejector pin shafts distributed thereon, and the ejector pin shafts extend upward after passing through the top plate of the welding base.

3. A welding module for BC battery string bonding according to claim 1, characterized in that, Welding wire clamping cylinders are fixed around the base plate of the welding seat. A pressure bar swing piece is hinged to the outer end of the top plate of the welding seat. The driving end of the welding wire clamping cylinder is pressed against one end of the pressure bar swing piece. A spring top sleeve is fixed on the top plate of the welding seat. The spring top sleeve is in elastic contact with the other end of the pressure bar swing piece. The pressure bar swing piece is pressed against the outside of the upper pressure bar.

4. A welding module for BC battery string bonding according to claim 1, characterized in that, A suction cup is installed in the middle of the top plate of the welding seat, and the suction cup is connected to the upper end of the ventilation column.

5. A welding module for BC battery string bonding according to claim 2, characterized in that, The middle layer plate of the welding seat is provided with a middle layer support column, and a support column limiting block is installed at the lower end of the middle layer support column. A magnet is provided inside the support column limiting block.

6. A welding module for BC battery string bonding according to claim 5, characterized in that, A magnet connecting shaft is installed inside the middle layer support column of the welding base. The lower end of the magnet connecting shaft is connected to the magnet by a screw, and a spring is installed at the upper end of the magnet connecting shaft. The spring is located inside the middle layer support column of the welding base.

7. A welding module for BC battery string bonding according to claim 5, characterized in that, The upper surface of the middle layer plate of the welding seat is provided with a fixing wire groove, and a pin fixing wire is placed in the fixing wire groove. A pin sleeve is fitted on the lower end of the pin shaft, and a pin protrusion ring is arranged around the pin sleeve. The pin fixing wire is engaged with the lower end of the pin protrusion ring.

8. A welding module for BC battery string bonding according to claim 1, characterized in that, A base plate air pipe connector is provided on one side of the welding base plate, and the base plate air pipe connector is connected to the air column and the air cavity.

9. A welding module for BC battery string bonding according to claim 1, characterized in that, A heating plate is installed between the middle layer plate of the welding base and the top plate of the welding base. A heating rod is fixed inside the heating plate, and a temperature sensor is installed on one side of the heating plate.

10. A welding module for BC battery string bonding according to claim 1, characterized in that, A heat insulation plate is provided on the base plate of the welding seat, and the heat insulation plate is locked to the upper edge of the welding seat mounting cavity.

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